Low constant current source

Discussion in 'General Electronics Chat' started by embedded.world, Jun 2, 2014.

  1. embedded.world

    Thread Starter Member

    Feb 27, 2014
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    Low constant current source

    Is there any low constant current source available like less than 20uA.

    I had find some of sources but minimum of 100uA from TI.



    (Was not able to post question with subject line)
     
  2. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,574
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    What is you load? What accuracy do you need?

    Ken
     
  3. #12

    Expert

    Nov 30, 2010
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  4. BobTPH

    Active Member

    Jun 5, 2013
    782
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    Depends on the accuracy and compliance range you need, a voltage source + resistor might work.

    For example. If the load will require 0.1 to 1V at constant 20uA, you could use a 20V source + a 1Meg resistor to make a 5% accuracy 20uA current source.

    Bob
     
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